Sheet-switching device for paper-folding machines



(No Model.)

T. G. DEXTER.

SHEET SWITCHING DEVICE FOR PAPER FOLDING MACHINES. No. 332,332.

Patented Dec. 15, 1885.

WWW/m a M 1 @wm ww Mai/M3 @mmww @3 3 NITED STATES ATENT OFFICE.

TALBOT O. DEXTER, OF DES MOINES, IOWA.

SHEET-SWITCHING DEVICE FOR PAPER-FOLDING MACHINES.

EPECIFIC'ATION forming part of Letters Patent No.332,332, dated December 15, 1885.

Application filed March 5, 1885. Serial No. 157,850. (N model.)

To aZZ whom it may concern:

Be it known that I, TALBOT C. DEXTER, a citizen of the United States of America, and a resident of the city of Des Moines, in the county of Polk and Statev of Iowa, have invented a new and useful Sheet-Switching Device for Paper-Folding Machines, of which the following is a specification.

In machines where there are two pairs of folding-rollers in parallel positions but. in different horizontal planes for the purpose of making parallel folds in a sheet in succession, it is sometimes desirable to make one pair of the parallel rollers inoperative as foldingrollers and simply use them to aid in advancing the sheet from the first pair of the parallel rollers to a pair of rollers extending therefrom at right angles, as required to make two folds in succession at right angles to each other, and I accomplish the results contemplated by the simple device illustrated in the accompanying drawings, in which- Figure 1 is a top or plan view of a section of a machine, and Fig. 2 a transverse section of the same, showing two pairs of foldingrollers in parallel position, and a third pair extending at right angles therefrom and my sheet-switching device combined therewith.

Jointly considered, these figures clearly show the construction, application, operation, and utility of my invention.

A represents the frame of a machine.

Nos. 1 and 2 are pairs of folding-rollers in parallel positions, but in different horizontal planes.

No. 3 is a third pair of folding-rollers extending at right angles, and in a lower plane, from the pair of rollers No. 2.

Z) b represent aseries of sheet-carrying tapes passed around the first one of each of the Nos. 1 and 2 pairs of rollers and extended parallel with the No. 3 rollers to a tape roller or pulleys 0, supported by the frame.

cl is an adjustable tape-carrying roller that has two sets of open bearings, d and 61, formed in or fixed to the frame in such positions relative to the three pairs of folding-rollers that it can be readily shifted from one set of bearings to the other to adjust tapes.

ff represent a series of sheet-carrying and sheet-switching tapes stretched over the adjustable roller (1 and the roller in the second and lowest pair of parallel rollers that is nearest to the pair of rollers No. 3. When the roller d is in the bearings d, the tapes f will act in concert with the tapes I) in carrying the folded sheet from the No. 1 pair of rollers and placing it across the No. 2 pair of rollers, as required to make a second fold parallel with the first fold.

To prevent parallel folds being made,I simply lock or remove the folding-blade of the No.2 pair of rollers and shift the shaft 01 from the bearings d to the bearings (1, so that the tapesf will be on top of the advancing sheet and direct it down between the No. 2 pair of rollers, to be from thence carried by the tapes I) and placed over the No. 8 pair of rollers, as required to make a fold at right angles to the fold previously made between the No. 1 pair of rollers.

I am aware that two rollers and a series of tapes have been carried in an adjustable frame for the purpose of changing the direction of a sheet in a paper-folding machine; but my manner of combining a single roller and a series of sheet-directing tapes with three pairs of folding-rollers so that a sheet can be carried through the second pair of rollers without producing two parallel folds in succession, whenever desired, is novel and greatly advantageous.

I claim as my invention A sheet-switching device for paper-folding machines, composed of a roller, (2, a series of endless tapes, f, and two pairs of roller-bearings d and d, in combination with pairs of foldingrollers No. 1, No. 2, and No. 3, a series of endless sheet-carrying tapes, b, and a series of pulleys or a roller, 0, to support the tapes b, to operate in the manner set forth, for the purposes stated.

TALBOT O. DEXTER.

Witnesses A. R. FULTON, H. W. BROWN. 

